Inspected the copper wire going in an out of the Fc space on the thermostat. This would then freeze up the clogged substance resulting in your Nest shutting off. Issue solved. A countrys social, lifestyle, culture, and economic condition can be judged by the quality of movies of that country. He spent the past twelve years living in Hawaii, where he worked closely alongside event planners and resort owners to perfect his knowledge of luxury products and aesthetics. To determine the status of this wire and if it has power or not, press on the dial and then rotate it until you select the small gear icon, and press the dial once more. The diagram showed a wire detected in Rc, but no power. Not knowing where mine was, I called my units installers and and they did a courtesy drop by to check the fuse and drain pan. Check to see whether the wire has been rusted or covered with paint. Also anytime there was a power outage, when power came back, the nest was showing e73. Remove the thermostat display from the base to expose the wires that are attached to it. The wire should also be free of corrosion or paint. (5 Easy Fixes), How to Get Adt Alarm Certificate? Check the system wires to make sure they are correctly entered and properly connected. Start by turning off the power to your HVAC unit. This occurs mainly due to extremely hot temperatures, burnt fuse, low voltage to the Rc wire, and much more. Once you've located the condensation overflow switch, lift up on it and remove it from the PVC pipe, then thoroughly wipe it clean using a paper towel. The fuse in question is for the low voltage circuit that supplies roughly 24VAC. Locate the air filter on your system, usually found behind a grate along the walls or ceiling. To narrow down possible causes of a No power alert, use your thermostat to navigate to its equipment information. If your system has multiple breakers, ensure to turn them all off. Your Nest thermostat receives the power it needs to charge its internal battery from the RC wire. My system has shut down. You could have either an Rc or an Rh wire. If so, what troubleshooting steps have you tried? We are very thankful to you if you use our links! Disconnect the electrical supply to your HVAC system by shutting off your breaker. If that is not an option for you, check your units manual for access and location of both the fuse and drain pan. Remove the Rc wire and examine it. Shut off power to the HVAC system by turning off the breaker. Using a voltmeter, test the Rc wire to check that the voltage across the wire is consistent. Have you found and solutions? It might also mean that the wire was incorrectly entered in the app. The most common of which is in the form of Nest error e73. Connect the wire back to the Nest connector when pressed down. https://support.google.com/googlenest/answer/9245516?hl=en. When I checked the thermostats display for any of the usual blinking lights, I saw the E73 error message and immediately decided to look it up online for some possible fixes to this problem. If they are loose or disconnected, reconnect them and see if that solves the issue. The main drain line that drains the AC from the unit to outside the house was clogged backing up water in the drain causing the float switch to activate. To fix this error, check your wiring, air filter, drain tubes/drip pans, and HVAC fuse and ensure that all of them are working correctly. Then just disconnect the Rc wire and not the other wires. I installed the new wiring plate and have never had the issue since!!! I had this same issue. Turn off your Nest if the issue is the frozen coil, as they first need to thaw and melt out. Seat the wire fully into the right connector. It's not installed in a normal fuse holder, it's installed using two female spade terminals. You may have noticed a lot of power issues associated with your Nest after receiving this E73 message. HubPages is a registered trademark of The Arena Platform, Inc. Other product and company names shown may be trademarks of their respective owners. Its easy to be intimidated by an E73 error since it shuts down your Nest thermostat and prevents you from using it until the problem is resolved. Just wanted to double check to see if you were still needing help on this? Get free, zero-commitment quotes from pro contractors near you. Once the water drained it left the float switch and AC came on. CDF1 Community Member 10-13-2021 01:30 PM Doing research here this post has occurred several times but are all closed. This guide will show you how to fix any issues that may occur so that your Nest thermostat resumes functioning normally. A minimum of one millimeter of exposed copper must be present, with no bends. If this is not the case, switch the wires and see if that fixes the problem. Now it works and no error message. Luckily, this is an easy thing to fixin most casesand should resolve your Nest thermostat's RC terminal power loss problem. Samsung TV Blinking Red Light: What It Means & How to Fix It! Plastic drain tubes link the drip pan to the cooling coils located beneath the drip pan. In this article, we will delve into the world of IMAX and explore the key differences between IMAX and other formats such as [], The film industry is one of the important industries of a country. Save my name, email, and website in this browser for the next time I comment. You may also contact a technician for this purpose. OnceI cleaned out the drain line all is working fine and the Nest Code "E73 wiring report" cleared on my Nest 3rd Gen Learning thermostat. If the wires are connected properly, you should check the breaker box to make sure that the circuit breaker has not been tripped. While this problem may sound too complex to fix on an individual level, it is not the case in reality. Their machine algorithm learns our behavior, changes house temperatures automatically and helps us save utility bills, and lets us control our home heating and cooling system from our smartphones. A couple of weeks ago, I found my Nest thermostat starting to show issues. Extreme temperatures in hot weather may break down the AC unit, especially when the Nest overworks. Blink Camera is Registered To Another Account: What Should I do? Do you find yourself wondering if its you or the picture thats not quite level? It relies on the charge that was created while the power was running. Test. It was laying on the terminal which allowed it to make an intermittent connection. Keep yourself safe. GooglesNest Thermostatis unquestionably one of the best programmable thermostats on the market these days. Exposed wires with active currents are a recipe for disaster. All that I really have done is turn the circuit breakers on and off to both the furnace and the blowers for the AC unit. A few days ago I got the same error message. When the air is limited enough, the system can freeze and shut down. This is done to avoid a water overflow. Turn your breaker back on to bring back the power. IMAX theaters are known for their massive screens, immersive audio, and state-of-the-art projection technologies that deliver an unparalleled movie-going experience. Please note that for power loss problems not related to a condensation overflow switch, there may be a solution for your problem on the Nest troubleshooting page. Then select Settings, Slide on the touch bar to hover over Equipment. Nest thermostat takes the crown when it comes to the most advanced features and most simplistic functioning. Max is a computer scientist specializing in home security devices, fire alarm systems, security cameras, and other smart devices. The support people are adequately trained to solve customers problems instantly. Even if an issue does occur, its simple to repair. Defrosting frozen cooling coils before using them again is the solution if the issue is that they are frozen. Extreme hot weather and low voltage on the Rc wire are its main causes. exactly what the issue was with my thermostat. The main drain line that drains the AC from the unit to outside the house was clogged backing up water in the drain causing the float switch to activate. I know I'm late to the game here, but here's something I found while installing a couple of Nest thermostats today. In some cases, this can cause your fuse to burn out, cutting the power supply from your HVAC system to your Nest thermostat. All you need to do is rule out the main cause behind such an error. Yes, it was the float switch! Now turn on the breaker to bring back the power. Replace the filter if it becomes filthy or clogged. Make sure both are in the On position. What software update? If the drains are clogged, water will fill the pipes and may result in an overflow. Further, ensure that there is no corrosion or water damage in your system. Improper or insecure connections are the most frequent cause of the E73 error. Note that if the voltage is 24vac, only it will receive the power. Did you ever hear back on a solution. Here are the steps to check the HVAC fuse: If none of the above hacks helped you, then feel free to contact the customer support team for their assistance. POSSIBLE RESOLUTION. You can describe your approaches to resolving the problem and how your thermostat is behaving now. The E73 error on your Nest thermostat indicates that there is no power detected to the Rc wire. We hope that our recommended products will be beneficial to you. The HVAC system is powered off at the circuit breaker, fuse box, or system switch, or theres a power cut. Nothing has changed. The main drain line that drains the AC from the unit to outside the house was clogged backing up water in the drain causing the float switch to activate. Reinsert the wire into the terminal. Detach your thermostats display from the base to reveal the wires connected to it. Your thermostat may disconnect from Wi-Fi if its not receiving power, even if the battery level is good. Make sure you mention all the different troubleshooting steps you implemented. Jason is an expert writer and is passionate about Smart Homes and Home Improvements writing as well as lifestyle and Lawn Care. Click on Technical Info under Settings. Make sure they are all turned off. Are you looking for the perfect thermostat temperature so that you're not wasting electricityand money? Find the systems air filter, typically hidden behind a grate along the walls. Or, you have the more practical alternative of calling an experienced HVAC technician who will quickly mend your system. Dont be afraid to contact a professional if you have any concerns. Error E73 indicates that no power is detected on the Rc wire and is one example of this kind of error. It could also be located inside the furnace, in which case, youll have to turn off the breaker before removing it. Turn your breaker back on to restore power to your HVAC system. In this article, I will tell you about all the different possible causes that can cause your Nest thermostat to not detect power to the Rc wire. What did you do to the float switch to fix it? No sure if this was a coincidence or if I hit the spot. Do the same tests on the other wires, to be sure. Clean or replace the filter if its blocked or unclean. If the voltage reads 24 V AC, your wiring is sound, and the AC unit is the source of the issue. Your email address will not be published. Follow these procedures to inspect your wiring: A blocked air filter is another frequent issue that may lead to this problem. Answered in 8 minutes by: HVAC Technician: V12Tech V12Tech: If you think wires are incorrectly connected to your thermostat and want additional help, contact Nest support. Our line was plugged up with mold and dust, causing water to back up into the HVAC unit's drain pan and setting off a high water switch or condensation overflow switchwhich caused the entire system to shut down. But, a Nest thermostat could occasionally cease functioning and show the messages lost power or no power to RC wire detected.. After replacing it, firmly reattach any panels you initially removed. The drip pan of the HVAC system is filled. (2). This ultimately causes the AC outdoor unit to break down and become non-functional. His testing experiences and several kinds of research made him progress in this field. Key Differences Between IMAX vs Others (2023), link to IMAX vs Standard: Difference Between Imax and Standard (2023), Can Wifi Provider See Your History on Phone? ago. 3. No power to the Rc wire detected." ERROR MESSAGE. Turn off the breaker to cut power to the HVAC system. To be thorough, you can perform the same checks on the other wires as well. My new heat pump and Nest Thermostat was installed a year ago. Locate the HVAC fuse on the control board for the HVAC system. To do so, follow this step-by-step guide to ensure all the equipment in the thermostat has no defect that can cause such an annoying problem at your end. To determine the source of the problem, try these steps: Usually, following the procedures outlined above will resolve the E73 problem. How do I check my Nest thermostat battery? If the cooling coils are located behind a sealed panel, do not remove the panel yourself as the system may not work properly without the seal. If you remove the face cover and the wire is OK the usual problem is the float switch. The most obvious reason your system isnt receiving power is that the power is off! I'm Shah. 2. The Nest Thermostat may not have Power to the RC wire if any of the following are correct: wiring, air filter, drain tubes/drip pans, and the HVAC fuse. Hello, I am trying to install a NEST 3rd generation. The main drain line that drains the AC from the unit to outside the house was clogged backing up water in the drain causing the float switch to activate. Thanks for the reply! E help codes cant be dismissed, so they wont disappear until the issue is fixed. Disconnect only the Rc wire and examine it. Manage Settings To get the most out of Google Home, choose your Help Center: U.S. Help Center, U.K Help Center, Canada Help Center, Australia Help Center. Now inspect the fuse carefully. The fixes mentioned above are the best troubleshooting steps if your Nest thermostat detects an E73, i.e., no power fault on the RC wire. Depending on the circuit, your HVAC system may have several breakers. A blocked air filter is a significant and frequent problem that causes E73 errors for several users. Now see if theres water in the drip pan. After an AC technician visited our home on two separate occasionsstill not finding the cause of this intermittent problemwe contacted a local HVAC technician who specializes in smart home technology. I'm glad it stopped for ya. Model GMS80704BXCC. I understand that these issues can be confusing but I definitely wanted to stop by and see how I could help. A countrys social, lifestyle, culture, and economic [], If you are using a wifi connection, your provider can see your browsing history. Kindly go through all the wires at a time. After all the wires are connected, re-attach your thermostat to its base. It works again for a bit and then nothing. Shut off the power to your HVAC system at the breaker. Rh is power input for the heating side. Here are the steps to resolve this issue: Your HVAC system must maintain appropriate circulation to operate, and a clogged air filter can significantly reduce the amount of air passing through the cooling coils, resulting in the systems automatic shutdown and buffering. The most common cause of no power in the E73/Rc wire appearing on the Nest Gen3 display is due to the AC outdoor unit/compressor shutting down, which in turn shuts off power to the Nest Thermostat. If you are unfamiliar with how to do this, consult an electrician. This is common as a lot of AC units fail during the summer due to hotter temperatures. Reinstall the Nest thermostat in the base, then allow a little time for it to restart. If the E73 Nest Thermostat does not receive any power from the Rc wire. Make sure the wire isnt corroded or painted over. Disconnect the Rc wire while maintaining all the other wires as they were, switching the thermostat to heat-only mode. Investing in a new Google Nest thermostat and facing no power issues is surely terrifying. See if you can find your systems air filter, often hidden behind a grate in the wall or ceiling. Check to see if it hasnt burnt out. A "No power" alert can be caused by the following: The thermostat wiring is incorrect. In this case, youll have both an Rh and an Rc wire. I have used a lot of Next thermostats and this is the first of this problem. It would be best if you did not attempt to remove a sealed panel containing the cooling coils unless you are an experienced technician. So we should've switched off that breaker. The main drain line that drains the AC from the unit to outside the house was clogged baking up water in the drain causing the float switch to activate. The condensation overflow switch may be located next to the HVAC's air handler, near where the condensation drain exits the unit. Pull down the switch at the breaker box to cut electricity to the HVAC system. 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